John t



(Hommel.) J. T. WILSN.

MANUPAGTURB 0F DRAW BARS.

No. 356,812. Patented Feb. 1, 1887.4

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JOHN rl". WILSON, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONEIIALF 'IO THE PITTSBURGH FORGE AND IRON COMPANY, OF SAME PLAGE.

`MANUFACTURE SPECIFCATION forming pari: of Letters Patent No. 358,812, dated February 1,1887.

Application filed September 21, 1886. Serial No. 214,178. (No model.)

To (LEZ whom it may concern.-

Be it known that I, JOHN T. lViLsON, acilizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain nenr and useful Improvements in the Manufacture of Draw-Bars; and I do hereby declare the following to be a full, clear, and exact description oi' the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

This invention relates to the manufacture of Wrought-metal drawbars, and has for its 0bject the construction of a draw-bar in which there is a continuous ber of metal between the body and the head oi' the bar.

The invention will be hereinafter described, and particularly pointed ont in the claims.

In the accompanying drawings, which form a part of this speeication, Figure l is a perspective view of a blank for forming drawbars in accordance with my invention. Fig. 2 is a plan showing the separated end of a bar turned ont laterally in dotted lines. Fig. 3 is a vienT illustrating the position of the two parts of the head preparatory to welding. Fig. 4 shows the completed head, and Fig. 5 represents a. vertical sect-ion of part of a clamping die with one end of a drawbar blank inserted.

Reference being had to the drawing-s and the letters marked thereon, A represents a blank which is forged thick at both ends, as shown ato e l) l). The thick portion are is for the purpose of strengthening the body of the draw-bar at the point th rough which the coup ling-pin passes, and the portion bb for furnish ing metal ontot' which the half-head Bis formed. In each end of the blank A is cnt a slot, o, of a depth sntieient to form arms d d, which are bent out laterally, as shown in dotted lines in Fig. 2, to furnish metal to form one half of the head of the draw-bar. The blank is also by preference provided with a central raised portion, e, for the purpose of forming the rear end of the draw-bar.

The operation of constructing a drawbar from my blank in accordance with my invention is as follows: The blank is heated at one end, the arms d bent out laterally, and the ends turned i11,as at It, upon an anvil. The blank is then placed in a suitable die, C, suc-h as shown in Fig. 5, or any other well known to the art, and one half of the hea-d B formed by forging, either by hand or by a drop-hammer. In forming this portion of the head the metal from the broadest port-ions of the arms d is crowded or forged outward from the eenter ot' the die and forms the central portion, fi, of the iange,\vhiel1eonstitutes the head of the bar, and the illetsj and It. The opposite end of the blank is then treated in the same manner, after which the blank is heated in the cente 1 and bent to form the top and bottom hars or straps. The tivo ends of the blank, en which the half-heads B have already been formed, are then heated to a Welding heat and the head Welded in the usual manner.

By this construction a very superior drawbar is produced, in which the metal presents a continuous ber from one end of the bar to the other, and in which only one weldingjoint is formed.

Having thus fully described my invention, what I elaiin isl. A blank fordraw-bars,eonsisting of a bar of metal forged with thick ends and having a longitudinal slot in said ends, leaving arms on each side with sufficient metal to forni one half of the head, substantially as described.

2. The method of manufacturing draw-bars, which consists in forging a blank with thick ends and slotsin said ends; secondly, heating the blank and bending the projecting arms laterally; thirdly, forming the half-heads ou each end of the blank in a die; fonrthly, bending the body of the bar, and, dually, Welding the head, substantially as described.

In testimony whereof I affix my signature in presence oi' tivo Witnesses.

JOHQT T. TWILSON..

Witnesses:

S. A. TERRY, D. C. Reinout.. 

